convert input string to lowercase

commands/addPhrase.ts

@@ -19,7 +19,7 @@ module.exports = {
 			.setRequired(true)
 			),
 	async execute(interaction) {
-		var abbreviation = interaction.options.toLowerCase().getString('abbreviation');
+		var abbreviation = interaction.options.getString('abbreviation').toLowerCase();
 		var phrase = interaction.options.getString('phrase');
 		await interaction.reply('Adding abbreviation `' + abbreviation + "` to target list. This will complete to the phrase `" + phrase + "`");
 		addPhrase(abbreviation, phrase);